/*
 * Copyright (C) 2019 xuexiangjys(xuexiangjys@163.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package com.xuexiang.xui_lib.component.imageview.crop;

import ohos.agp.render.Paint;
import ohos.agp.utils.Color;
import ohos.agp.window.service.Display;
import ohos.agp.window.service.DisplayManager;
import ohos.app.Context;
import ohos.global.resource.NotExistException;
import ohos.global.resource.WrongTypeException;

import com.xuexiang.xui_lib.ResourceTable;

import java.io.IOException;
import java.util.Optional;

/**
 * 裁剪边框画笔的构建工具类.
 */
final class PaintUtil {
    private PaintUtil() {
        throw new UnsupportedOperationException("u can't instantiate me...");
    }

    // Private Constants ///////////////////////////////////////////////////////
    private static final String DEFAULT_LINE_COLOR_ID = "#AAFFFFFF";
    private static final String DEFAULT_BACKGROUND_COLOR_ID = "#B0000000";
    private static final float DEFAULT_LINE_THICKNESS_DP = 3;
    private static final float DEFAULT_CORNER_THICKNESS_DP = 5;
    private static final float DEFAULT_GUIDELINE_THICKNESS_PX = 1;

    // Public Methods //////////////////////////////////////////////////////////

    /**
     * Creates the Paint object for drawing the crop window border.
     *
     * @param context the Context
     * @return new Paint object
     */
    static Paint newBorderPaint(Context context) {
        // Set the line thickness for the crop window border.
        Optional<Display> display = DisplayManager.getInstance().getDefaultDisplay(context);
        final float lineThicknessPx = DEFAULT_LINE_THICKNESS_DP * display.get().getAttributes().densityPixels;
        final Paint borderPaint = new Paint();
        borderPaint.setColor(new Color(Color.getIntColor(DEFAULT_LINE_COLOR_ID)));
        borderPaint.setStrokeWidth(lineThicknessPx);
        borderPaint.setStyle(Paint.Style.STROKE_STYLE);

        return borderPaint;
    }

    /**
     * Creates the Paint object for drawing the crop window guidelines.
     *
     * @param context
     * @return Paint
     */
    static Paint newGuidelinePaint(Context context) {
        final Paint paint = new Paint();
        paint.setColor(new Color(Color.getIntColor(DEFAULT_LINE_COLOR_ID)));
        paint.setStrokeWidth(DEFAULT_GUIDELINE_THICKNESS_PX);
        return paint;
    }

    /**
     * Creates the Paint object for drawing the corners of the border 剪切框四角
     *
     * @param context the Context
     * @return the new Paint object
     */
    static Paint newCornerPaint(Context context) {

        // Set the line thickness for the crop window border.
        final float lineThicknessPx = TypedValue.applyDimension(
            TypedValue.COMPLEX_UNIT_DIP, DEFAULT_CORNER_THICKNESS_DP,
            TypedValue.getDisplayAttributes(context));
        final Paint cornerPaint = new Paint();
        cornerPaint.setStrokeWidth(lineThicknessPx);
        cornerPaint.setStyle(Paint.Style.STROKE_STYLE);
        try {
            int color = context.getResourceManager().getElement(ResourceTable.Color_colorPrimary).getColor();
            cornerPaint.setColor(new Color(color));
        } catch (IOException e) {
            e.printStackTrace();
        } catch (NotExistException e) {
            e.printStackTrace();
        } catch (WrongTypeException e) {
            e.printStackTrace();
        }
        return cornerPaint;
    }

    /**
     * Creates the Paint object for drawing the translucent overlay outside the
     * crop window.
     *
     * @param context the Context
     * @return the new Paint object
     */
    static Paint newBackgroundPaint(Context context) {
        final Paint paint = new Paint();
        paint.setColor(new Color(Color.getIntColor(DEFAULT_BACKGROUND_COLOR_ID)));
        return paint;
    }

    /**
     * Returns the value of the corner thickness
     *
     * @return Float equivalent to the corner thickness
     */
    static float getCornerThickness() {
        return DEFAULT_CORNER_THICKNESS_DP;
    }

    /**
     * Returns the value of the line thickness of the border
     *
     * @return Float equivalent to the line thickness
     */
    static float getLineThickness() {
        return DEFAULT_LINE_THICKNESS_DP;
    }
}
